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2 years ago

Solve the following equation:8p-8=2p+16

Mathematics

1 answer:

EleoNora [17]2 years ago

3 0

Answer: p=4

Step-by-step explanation: Isolate the variable by dividing each side by factors that don't contain the variable.

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When do you use ( P ) in simple interest word problems? i always get Interest ( I ) mixed up with .. i know HOW to solve it but

alexandr1967 [171]

90/2 = 45
45/1700 = 0.02647
0.02647 x 100 = 2.64
2.46%

8 0

3 years ago

−13 − (−27) <br> pls help-

sergij07 [2.7K]

Answer:14

Step-by-step explanation: minus *minus = + so its +27

and then you just do the maths 27-13=14

3 0

3 years ago

In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time coll

ICE Princess25 [194]

Answer:

a) n = 1037.

b) n = 1026.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

(a) Assume that nothing is known about the percentage to be estimated.

We need to find n when M = 0.04.

We dont know the percentage to be estimated, so we use $\pi = 0.5$ , which is when we are going to need the largest sample size.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 2.575\sqrt{\frac{0.5*0.5}{n}}$

$0.04\sqrt{n} = 2.575*0.5$

$(\sqrt{n}) = \frac{2.575*0.5}{0.04}$

$(\sqrt{n})^{2} = (\frac{2.575*0.5}{0.04})^{2}$

$n = 1036.03$

Rounding up

n = 1037.

(b) Assume prior studies have shown that about 55% of full-time students earn bachelor's degrees in four years or less.

$\pi = 0.55$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 2.575\sqrt{\frac{0.55*0.45}{n}}$

$0.04\sqrt{n} = 2.575*\sqrt{0.55*0.45}$

$(\sqrt{n}) = \frac{2.575*\sqrt{0.55*0.45}}{0.04}$

$(\sqrt{n})^{2} = (\frac{2.575*\sqrt{0.55*0.45}}{0.04})^{2}$

$n = 1025.7$

Rounding up

n = 1026.

6 0

3 years ago

Celia bought a bag of 1212 goldfish for \$3$3. What is the cost of 11 goldfish?

Anvisha [2.4K]

$2.75
it would most likely be 4 goldfish for $1

7 0

3 years ago

Brainlyist to whoever answers first

levacccp [35]

Answer:

The answer is 106

Step-by-step explanation:

angle B is equal to angle D

so do 91 + 15= 106

and the math at angle D is x - 15

hope this helps! :D

8 0

3 years ago

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